S
M
T
W
T
F
S
26
78°
59°
27
76°
59°
28
77°
58°
29
76°
59°
30
77°
59°
31
75°
58°
1
78°
59°
2
78°
57°
3
79°
58°
4
76°
59°
5
80°
50°
6
74°
52°
7
75°
57°
8
78°
56°
9
74°
55°
10
74°
52°
11
71°
56°
12
76°
57°
13
71°
56°
14
72°
51°
15
70°
50°
16
69°
48°
17
73°
49°
18
69°
49°
19
68°
48°
20
69°
50°
21
70°
53°
22
72°
55°
23
73°
56°
24
76°
56°
25
76°
55°
26
77°
53°
27
75°
54°
28
74°
53°
29
74°
53°
30
75°
47°
31
70°
43°
1
65°
43°
2
64°
44°
3
64°
42°
4
63°
44°
5
64°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Fossambault-sur-le-Lac
Fossambault-sur-le-Lac's August 2026 forecast shows daily high temperatures ranging from 63° to 80°, with overnight lows between 42° and 59°. The average high for August is 73° with an average low of 53°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Fossambault-sur-le-Lac. See also: September | October | November.